Zimbabwe police have raided the headquarters of the main opposition party, the Movement for Democratic Change, taking about 200 people into custody.

A party spokesman, Nelson Chamisa, says those detained had been attending meetings inside Harvest House - the building housing the MDC's headquarters.

There was no immediate confirmation from Zimbabwean authorities.

Police this week extended a ban on political rallies and demonstrations in parts of the capital, Harare, until June 23. Zimbabwe's government initially imposed a three-month ban on political gatherings in February, just before beginning a crackdown on the MDC.

In March, opposition leader Morgan Tsvangirai and other MDC members were beaten as police shut down a planned rally.